[CentOS] Vsftpd & Iscsi - fast enough

[Karl R. Balsmeier]

Ross S. W. Walker wrote:
>> -----Original Message-----
>> From: centos-bounces at centos.org 
>> [mailto:centos-bounces at centos.org] On Behalf Of Karl R. Balsmeier
>> Sent: Tuesday, May 22, 2007 2:28 PM
>> To: centos at centos.org
>> Subject: [CentOS] Vsftpd & Iscsi - fast enough
>>
>> To extend space on our 64-bit centos FTP servers, we are considering 
>> setting them up to work with an existing PromiseRAID system via iscsi.
>>
>> -just curious if anyone here knows if iScsi is fast enough to 
>> serve up 
>> all the images?
>>
>> -might it be something where we get dedicated cards and put the iScsi 
>> traffic on its own Vlan?
>>
>> Just curious if this would hold up under alot of traffic, 
>> like weather 
>> images and the like...
>>     
>
> The ability of iSCSI to support high throughput depends on:
>
> 1) How the back-end storage being served up by iSCSI is configured
> 2) How the network interconnects between the iSCSI targets and
> initiators are configured
> 3) How well the FTP software does at reading the data from disk and
> pumping it out the network
>
> 1Gbps ethernet can handle up to 115MB/s per interface. Using MPIO
> round-robin over several interfaces you can continue to add throughput
> if the application can scale well across these multiple paths.
>
> -Ross
>
>   
hey this part is fascinating, -so how would one practically deploy this, 
-say 4 GB NICs and some supported hardware?  for traffic 100 - 200 megs 
daily perhaps this is too much?  On the storage side, not sure if MPIO 
will auto-detect the device, but maybe it'll see it.  -wonder if Vsftpd 
would play well with all of this.

-krb
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